In celebration of Nonprofit and Voluntary Sector Quarterly’s 50th anniversary, we present a bibliometric analysis of nonprofit research published between 1999 and 2019, within and outside of three core nonprofit journals— NVSQ, NML, and Voluntas. We seek to understand which journals, across scientific domains and social science disciplines, inform nonprofit research in one of three ways, by (a) publishing articles, (b) citing the three core journals, or being cited in these core journals. We found that nonprofit research published in economics and social sciences journals has kept pace with a large increase in indexed research. Meanwhile, though the core nonprofit journals robustly cite and are increasingly cited by business and management and public administration journals, they are less engaged with other social science disciplines. We discuss ways that the core journals could increase their visibility and penetration into these other disciplines and highlight perspectives potentially missing from the core journals.